Welding machine for plastic sheets



FIG. 1 is a front perspective view of a welding machine for plastic sheets showing our design;

FIG. 2 is a left side elevational view thereof;

FIG. 3 is a right side elevational view thereof;

FIG. 4 is a front elevational view thereof;

FIG. 5 is a rear elevational view thereof; and,

FIG. 6 is a top plan view thereof. 

CLAIM The ornamental design for a welding machine for plastic sheets, as shown and described. 